Improvement in journal-boxes for rolling-mill pinions



2 Sheets-Sheet; 1..

ELHAMILTON. V Journal-Box for Rolling-Mill Pinion.

Patented July 23, 1878.

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n I! PETERS 00., PHD wnsmuc'ron a c 2 Sheets-Sheet 2* H. HAMILTON. Journal-Box forRolling-Mi1l Pinion.

Patented July 23. 1878.

% J7%7L@7? I NORRIS Pmns co. Puma-urn UNITED TATES ,ATENT. OFFICE.

HOMER HAMILTON, or YOUNGSTOWN, OHIO, ssrenon, BY MEsNE ASSIGN- MENT, or ONE-HALF HIS RIGHT TO BROWN, BONNELL & 00., 0F SAME PLACE.

lMP'ROV-EM-ENT IN JOURNAL-BOXESFOR ROLLING-MILL PINIO'NS.

Specification forming part of Letters Patent No. 206,319, dated July :23, 1878; application filed May 23, 1878.

To all 'lCllO'lil it may emcern:

Be it. known that I, HOMER HAMILTON, of

Youngstown, in the county of Ma-honing and State of Ohio, have inventedcertain new and useful Improvements in Journal r Boxes for Rollin g-Mill Pinions and other Purposes; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, refer ence being had to the accompanying drawings, and to letters of inference marked thereon,

which form a part of this specification.

My object is to produce an economical and simple journal-box for rolling-mill pinions, and that'is not so liable to get out of order as those I now in use.

'screw'or wedges. The rapid rate at which the pinions revolved and the power transmitted by them produced so much jar or vibration that it was almost impossible to keep the piniong-journals in practical running order without constant attention. The brass or bcarin gs would also wear out very rapidly by reasonof the constant change of position and the formingof new bearings on the brasses.

Referring to the drawings, Figure 1 represents an elevation of pinions, rolls, and housings, to the )inion-bearings ,of which my improved journal-box is especially applicable; Fig. 2, the pinion-housing with my improved journal-box; Fig. 3, the pinion-journal box enlarged; and Fig. 4, a cross-section of the same, taken at the line :v a: of Fig. 3. In Fig. 5, I have shown a top view of one of the -rollpinions, with the journal-boxes in section, to illustrate the rounded ends of the metal lin ing for the shoulders g of said pinion.

Thevboxes are cast in one piece, of brass,

iron, or other suitable metal, and recessed on the inside for the reception of the Babbitt metal 0, the recessat the inner end of the box being open, as shown in Fig. 4. In theupper part of the .box are arranged two grooves 01' depressio'ns, ff, one bein g intended for suet and the other one for oil or water, for constantly lubricating:the.pinion,journals, which are inserted in the boxes, and. these, being of on'e piece,,ha ve a much firmer and steadier bear. in g than. those now in 'use,in which new irregular bearin gs are made in a short time by thc' heavy strains caused by the sudden jarring when the iron is introduced, as also by the great rapidity with which the pinions revolvea'nd impart motion to the rolls, and also the backlash occasioned by the sudden reduction of the power when the iron has passed through the rolls, and the resistance is not so great.

The advantages of my improved pinion-journalbox are, that it is much more simple in its construction by being in one piece, and can be easier turned out to its proper diameter and finished on its outside. It prevents the cutting of the pinion-journals bybein g rounded at the inner edges a, as shown inFig. 4, where the boxes now in use come in contact witht hc journals. It is much more economical, and, being merely a plain casting of iron or brass, with a Babbitt-metal lining,'it-is much more durable, having a greater wearing-surface than the boxes now in use; and the boxfbeing fitted loosely in the housing, accommodates itself to the pinion-journal; andthe perpendicular height being equal to the pitch of the pinion, it is impossible to misplacc or misuse it by persons who lack skill or j ud gmcnt. It c0nstantly lubricates the journals of the pinions by the suet or oil or water in the top grooves.

The sin gle-castin gbox with the Babbitt bearin g and the grooves may be used with machinery in general.

The slots for the lubricants I always use at the top, so that they are kept in contact with the pinion-journal better than they could be if placed at the bottom of the box.

My improved box is not adapted for rolling- 'niill-rolls, for the reason that-the perpendicular height of the box is made equal to the diameter of the pinions when properly in gear,- and admits of no adjusting, as the pinions are not adjustable; consequently it would not answer for rolls, as they have to be constantly adjusted for different thicknesses of iron. Vlhile a 11 the rolls are adjustable, the pinions cannotbe, because, for a twelveunch train, the pinions are made twelve inches at pitch-line, andwhcn in gear they are just twelve inches between centers, and the perpendicular height of my box when in place will be, just twelt'e inches. My journal-boxis therefore designed with special reference to rolling-mill pinions and their housings, and in this particular the latter diifers from a roll-housing in this,the space between in the pinion-housing is made narrow, just wide enough to admit the pinion journals or necks and room for theside bearing required, and the top is open, with a cap held down by two bolts, while roll-housings are. made wide, so that the needed side chucks for adjusting can be got in, and also that the rolls may be taken out by taking off the top boxes and pulling the body endwise through the housin g, and a tap-screw is used for adjust in g them.

It will be seen that the recess in the box for the metal lining a forms end inward projections a a, the inner one, a being of less depth than the outer one, a, as shown in Figs. 4, 5, for the purpose of exposing a metal-lining end bearing, a, for the shoulder g of the pinion B, as shown in Fig. 5, to wear against, which is 'rery important, as there is considerable end-thrustto the pinions when in operation, and it saves the cutting out of the journals. These end shoulders to and a serve to retain the metal lining from endwise movement, while longitudinal rid es i i '1', (shown in Fi 3,) by which the top grooves f f for the lubricants are formed, serve also to prevent said lining e from turning with the journal.

In Fig. 1 the dotted lines n show the pitchline of the pinionslitebe equal to the perpendicular height of the box, so that any one of the boxes can be used with any one of-thc pinions, so that no misplacement is possible, and maintain the pinions always at the proper distance between centers.

I am aware that a journal-box has been made in one piece and lined with Babbitt metal,

and that such lining has been locked to the box by being extended into grooves-that prevent it from turning or moving endwisc under the action of the journal, and therefore I make no claim, broadly, to such construction; .but

'my improvements are specially adapted for use with the journals of thc'pinions of rollingmills, and in such connection not only cmbraee new features of. construction, but are new in such combination.

I claim-- 1. Ajournal-box in one pieceof metahlined as described, having the groovcsfj", the end shoulders a a and the rounded lining-bearinga at the inner end for the shoulder of the pinion 13, as herein set forth.

' 2.IA journal-box constructed substantially as herein described, havinga perpendicular height equal to the diameter of the pinion '13 of a rolling-mill, whereby the several boxes when in place'will be equal in height to the pitch-lineof'the-several pinions, to obtain the advantages stated.

3. ,A journal-box in one piece of metal, lined as described, having the top interior grooves ff formecLby the longitudinal box-ridges 1'- i 'i, in the manner and for the purpose set forth.

4. A journal-box of one piece of metal, lined, and having the top groovcsfj" formed as described, in combination with the housings and the pinions ofi'olling-mills, all constructed substantiall as and for the purpose described.

In testimony that I claim the foregoing I have ailixed my signature in presence of two witnesses.

HOMER H MILTON. Witnesses FRED. R. HARRIS, MASON Evans.

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